lang/gcc34 does not compile fully

[Dave Evans]

A week ago, I wrote about my problems with compiling
lang/gcc34. I'm glad to say I've found the solution.

-mcpu=pentiumpro considered harmful.

The -mcpu option was upsetting the post-stage2
compilation and configuration of
build/i386-portbld-freebsd5.2/libiberty.
Configure was failing to find certain standard
include files, thus regex.c was failing to compile.
There were also numerous warnings from
other files in the directory.

To get rid of -mcpu, install the latest files
in /usr/share/mk and rebuild gcc from clean.

===
Another little problemette. If I install
new include files on the system, how do
I run the fixincludes script without
having to rebuild and reinstall the
whole compiler, which takes ages on
my Pentium 120?